| Abstract
| - The reactions of RSi(OH)3 with ZnMe2 in molar ratios of 1:3 and 1:1.75 afforded octanuclear Zn8Me7(dioxane)2(O3SiR)3 and heptanuclear [Zn7Me2(THF)5(O3SiR)4] zinc siloxanes, respectively. The synthesis and X-ray crystal structures of these two compounds are reported.
- In continuation of our previous work on the synthesis of zinc siloxanes to understand theinfluence of stoichiometry in the assembly of polyhedral zinc siloxanes, we have carried outtwo different reactions between RSi(OH)3 [R = (2,6-i-Pr2C6H3)N(SiMe3)] and ZnMe2 in molarratios of 1:3 and 1:1.75. In these reactions, we have isolated an octanuclear Zn8Me7(dioxane)2(O3SiR)3 (5) and a heptanuclear zinc siloxane [Zn7Me2(THF)5(O3SiR)4] (6), respectively.Compound 5 is a complex cage structure and can be understood as being a derivative of adrum-shaped species containing a Zn7Si3O9 core. In contrast, 6 consists of a Zn4Si4O12 unitwith zinc and silicon atoms occupying alternate corners of the cube; three contiguous facesof this cube are capped by zinc atoms, leaving the other three faces open.
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